Rename heartbeats to cron check-ins

Changed

• Rename heartbeats to cron check-ins. Calls to Appsignal.heartbeat and Appsignal.Heartbeat should be replaced with calls to Appsignal.CheckIn.cron and Appsignal.CheckIn.Cron, for example:

  Elixir

  # Before
  Appsignal.heartbeat("do_something", fn ->
    do_something()
  end)
   
  # After
  Appsignal.CheckIn.cron("do_something", fn ->
    do_something
  end)

Deprecated

• Calls to Appsignal.heartbeat and to methods in Appsignal.Heartbeat will emit a deprecation warning at compile-time.

View the Elixir package v2.12.2 changelog for more information.